Back cover for electronic device



FIG. 1 is a perspective view of back cover for electronic device showing a first embodiment of our design;

FIG. 2 is a front elevational view of the first embodiment of our design;

FIG. 3 is a left side view of the first embodiment;

FIG. 4 is a perspective view of back cover for electronic device showing a second embodiment of our design;

FIG. 5 is a front elevational view of the second embodiment of our design; and,

FIG. 6 is a left side view of the second embodiment.

The broken line showing of the remainder of the electronic device is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a back cover for electronic device, as shown and described. 